I know it took me a while to reply here, but thanks for the advice everyone.
Basically at this point, I really only trust one of them (he was away for a month and had nothing to do with any recent events) and am hesitant about doing anything now with the others - it's a matter of trust.
When one of them calls (this being one of the two guys that apologized), I'll probably only be willing to go IF
1.) It's a really great or very big event
2.) I would be ok with
everyone involved (figuring like 5-6 people are involved).
For example, one of the two guys called me tonight asking to meet at a certain place (I was out w/ family earlier anyway, so it's not like I was at home all this time lol

). He was with my best friend (the one I trust), but also with one of the guys that has annoyed me a lot lately and some other guy that I don't care for. Of course it seemed like I was snubbing him here, but I won't say out in the open "I'm not going because (so and so) is there too." I just make up an excuse not to go - not necessarily a total BS excuse, but something that puts me in the clear. My reasoning for not jsut coming out with the truth over the phone is that these guys will tend to get "speaker-happy" and not tell you you're talking to them through speaker mode, so badmouthing the group here wouldn't be the best solution.
Bottom line is they have to regain my trust before I agree to go out with them comfortably again. With less than a month till college, I don't feel a great urge to have to go out with these guys either, especially now since they are starting to hang with guys I don't associate myself with.